Arena Pharma and 3 Nasdaq Must Watch Stocks

A123 Systems, Inc. (NASDAQ:AONE): The company, which develops and manufactures advanced lithium-ion batteries and battery systems for the transportation, electric grid and commercial markets, introduced its Nanophosphate EXT, a technology for lithium ion batteries that enables their operation at extreme temperatures without the need for thermal management such as heating or cooling systems – according to the company this technology could open up new avenues in transport and telecom markets. The shares have traded in a 52-week range of $0.82 to $5.91.

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Ramtron International (NASDAQ:RMTR): The company is proposed to be bought out by Cypress Semiconductor (NASDAQ:CY) which announced an offer to acquire all outstanding shares for a cash payment of $2.48 per share – a generous offer considering it marks a 37 percent premium on the June 11 price of Ramtron. The shares have traded in a 52-week range of $1.65 to $3.18.

First Solar, Inc. (NASDAQ:FSLR): The company, which is planning to shut its German plants by end-2012, is seeing a surge in orders and is boosting production at the plants to achieve almost full capacity until at least October 2012. Thereafter the company plans to taper down production until closure by the end of the year. The shares have traded in a 52-week range of $11.43 to $142.22.

Arena Pharmaceuticals, Inc. (NASDAQ:ARNA) and Vivus (NASDAQ:VVUS): Shares of these companies rose today in response to a press release by Five Star Equities which claimed that their weight loss drugs could secure first-mover advantage in a highly profitable market. The shares have traded in a 52-week range of $1.23 to $8.65.

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